I failed my last inspection because my headlights were..... wonky. I had installed 100W LEDs without replacing the PWM module and they died a slow and agonizing death. The inspection station was not having it, period. So I put halogens back in to pass reinspect. While installing the replacement bulbs I noticed the wiring within the headlight assembly was missing literally all of it's insulation. It's burned off, gonzo... completely. I guess it's not up to carrying 100W per bulb for years. How silly of me. So my next project WAS going to be to replace the wiring within the headlight assembly. I don't know how other GMT360s are, but in the Bravada, there is a single plug that goes to the assembly and the assembly breaks out for hi-beam and low beam. In other words, there is a circuit within the assembly that the body plugs in to. It's the circuit within the assembly that's missing insulation. Some quick searching yielded results for direct-to-battery harnesses including relays for lots of different vehicles... but I couldn't find any specific to GMT360s. I know others have done this type of upgrade to their vehicles and I can only presume that it was accomplished by cobbling together pieces/parts (wiring, relays, sockets, etc...).... but on the off chance that anyone knows of an off-the-shelf kit that's available... I'd love to know about it.
Headlight Wiring Replacement
- Thread starter TequilaWarrior
- Start date
Blckshdw
Moderator
There is no kit for this, but it's also not as complicated as you're thinking. You've got the 4 wires, the 4 pins that go to the connector from the truck, and then the plug ends for the bulbs, that's it. You can buy replacement 9005/9006 pigtails, a dime a dozen wherever you prefer to purchase them. The pins for the base socket would be the only challenge if you wanted to crimp new ones in.
What I did for this years ago, was pull the existing pins out of the housing (after cutting or baking them open), snip off the old wires, solder the new pigails to them and call it a day. I don't recall the gauge, but the new pigtails were heavier than the stock wires were.
What I did for this years ago, was pull the existing pins out of the housing (after cutting or baking them open), snip off the old wires, solder the new pigails to them and call it a day. I don't recall the gauge, but the new pigtails were heavier than the stock wires were.
The only Wire meant for use in Automotive Applications should meet these Minimum Standards:
(1) Solid Copper (NOT Copper Clad Aluminum).
(2) High Heat Resistance (+392 F and -140 F ) for the BNTECHGO Products.
(3) Silicone Insulation vs. Flammable Acrylic or Plastic versions.
(4) As Close to OEM Colors for ID Purposes as Possible (10 Color Bundle @ 5 Ft Lengths).
(1) Solid Copper (NOT Copper Clad Aluminum).
(2) High Heat Resistance (+392 F and -140 F ) for the BNTECHGO Products.
(3) Silicone Insulation vs. Flammable Acrylic or Plastic versions.
(4) As Close to OEM Colors for ID Purposes as Possible (10 Color Bundle @ 5 Ft Lengths).
BNTECHGO 18 Gauge Silicone Wire Kit 10 Color Each 5 ft Flexible 18 AWG Stranded Tinned Copper Wire - - Amazon.com
BNTECHGO 18 Gauge Silicone Wire Kit 10 Color Each 5 ft Flexible 18 AWG Stranded Tinned Copper Wire - - Amazon.com
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You didn't miss anything. The headlight assembly for this car is in the neighborhood of $200 and up, per side, USED and in "meh" condition, when they can be found. It's a 2002 Bravada. Not a super popular variant of GMT360 and no other headlights will fit. There are no aftermarket options. There's also no front-end swap that will fit, unfortunately. $400+ for very worn housings that need polished anyway is a terrible starting position for this fix. The first thing I did was to look for new housings. I was not able to find anywhere that had new assemblies available and in stock. One place had a listing for a NOS left head lamp assembly for $1200, and no right assembly; but that listing was taken down a day later.
What about a replacement harness like this one... perhaps useful with slight modifications?
Relay Wire Harness 30A 9005 HB3 Head Light High Beam Replace Socket Ceramic Lamp
https://www.ebay.com/itm/1331303522...=0&customid=link&campid=&toolid=20001&mkevt=1
Relay Wire Harness 30A 9005 HB3 Head Light High Beam Replace Socket Ceramic Lamp
https://www.ebay.com/itm/1331303522...=0&customid=link&campid=&toolid=20001&mkevt=1
I'm actually contemplating something similar. The specific harness you posted would require some modifications in order to make it work.
I've got new bulbs in a cart at RockAuto and 3 harnesses in a cart on ebay right now.
1 harness for high beams, 1 harness for low beams, and 1 harness for fogs.
It might seam a little silly to add 3 harnesses but the 4 light harnesses I found would either take longer to ship or were actually just (2) 2 light harnesses connected together at the positive eyelet.
So, right now the potential plan is to skip the in-assembly wiring altogether and install a direct-to-battery relayed harnesses for highs, one for lows, and a separate one for fogs along with replacing all 6 bulbs: (2) 9005, (2) 9006, and (2) 893 - all Hella Long Life.
The problem I'm trying to solve is that the wiring inside the headlamp assembly is shot. So I need to replace the bulb sockets and wires within the assemblies. Wiring TO each assembly is fine, so I'll modify it to make the connections to these harnesses.
I've got new bulbs in a cart at RockAuto and 3 harnesses in a cart on ebay right now.
1 harness for high beams, 1 harness for low beams, and 1 harness for fogs.
It might seam a little silly to add 3 harnesses but the 4 light harnesses I found would either take longer to ship or were actually just (2) 2 light harnesses connected together at the positive eyelet.
So, right now the potential plan is to skip the in-assembly wiring altogether and install a direct-to-battery relayed harnesses for highs, one for lows, and a separate one for fogs along with replacing all 6 bulbs: (2) 9005, (2) 9006, and (2) 893 - all Hella Long Life.
The problem I'm trying to solve is that the wiring inside the headlamp assembly is shot. So I need to replace the bulb sockets and wires within the assemblies. Wiring TO each assembly is fine, so I'll modify it to make the connections to these harnesses.
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What's everyone's opinion on lights like these:
2Pcs LHD RHD H4 H7 H11 9005 9006 Bi-LED Mini Projector Lens Bulbs Headlight 100W | eBay
Package Include: 2Pcs LED Headlight Projector Lens Bulb Note: Lamp hole must be > 20mm can be installed. Features: 1. Car Led Headlight with Projector Lens,Perfect Light Pattern. 2. Upgrade Mini Size. Super Mini. Smaller than the old type. 3. Plug and Play, Easy to Install. 4. Aviation Aluminum...
www.ebay.com
Blckshdw
Moderator
Never seen that style used for low/high beams. Would definitely like to see output shots if you decided to try them out,
You can still get a factory headlight harness (used). I dont know where the harness plug is, but this auction clearly shows one..
There are more listed on eBay too.. Looks like the only real difference are with and without fog lights, and maybe the ElectroViscous Fan..
Or are you needing the headlight housings? You can always polish them, and look like new if done right..
Drivers side..
Passenger
Decent ones are out there.. Just gotta find em..
2005 Trailblazer Headlight Wiring Wire Harness Complete | eBay
Find many great new & used options and get the best deals for 2005 Trailblazer Headlight Wiring Wire Harness Complete at the best online prices at eBay! Free shipping for many products!
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Front Lamp Wiring Harness No Fog Lights ID: 15197037 Fits 03 Chevy Trailblazer | eBay
All wires intact no cuts or missing plugs.
www.ebay.com
There are more listed on eBay too.. Looks like the only real difference are with and without fog lights, and maybe the ElectroViscous Fan..
Or are you needing the headlight housings? You can always polish them, and look like new if done right..
Drivers side..
Drivers Left Headlight Fits 2002-2004 OLDSMOBILE BRAVADA | eBay
Find many great new & used options and get the best deals for Drivers Left Headlight Fits 2002-2004 OLDSMOBILE BRAVADA at the best online prices at eBay! Free shipping for many products!
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Used Left Headlight Assembly fits: 2002 Oldsmobile Bravada L. Grade A | eBay
Find many great new & used options and get the best deals for Used Left Headlight Assembly fits: 2002 Oldsmobile Bravada L. Grade A at the best online prices at eBay! Free shipping for many products!
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Passenger
Passenger Right Headlight Fits 02-04 BRAVADA 670399 | eBay
Find many great new & used options and get the best deals for Passenger Right Headlight Fits 02-04 BRAVADA 670399 at the best online prices at eBay! Free shipping for many products!
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Passenger Right Headlight Fits 02-04 BRAVADA 259179 | eBay
Find many great new & used options and get the best deals for Passenger Right Headlight Fits 02-04 BRAVADA 259179 at the best online prices at eBay! Free shipping for many products!
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Passenger Right Headlight Fits 02-04 BRAVADA 3997543 | eBay
Find many great new & used options and get the best deals for Passenger Right Headlight Fits 02-04 BRAVADA 3997543 at the best online prices at eBay! Free shipping for many products!
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Decent ones are out there.. Just gotta find em..
2002 oldsmobile bravada headlights for sale | eBay
Get the best deals for 2002 oldsmobile bravada headlights at eBay.com. We have a great online selection at the lowest prices with Fast & Free shipping on many items!
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Mooseman
Moderator
100W LED or halogen, it's still 100W and could melt your stock wiring again, unless you upgrade it.What's everyone's opinion on lights like these:
2Pcs LHD RHD H4 H7 H11 9005 9006 Bi-LED Mini Projector Lens Bulbs Headlight 100W | eBay
Package Include: 2Pcs LED Headlight Projector Lens Bulb Note: Lamp hole must be > 20mm can be installed. Features: 1. Car Led Headlight with Projector Lens,Perfect Light Pattern. 2. Upgrade Mini Size. Super Mini. Smaller than the old type. 3. Plug and Play, Easy to Install. 4. Aviation Aluminum...www.ebay.com
Tonight I took a brief run at replacing the in-assembly wiring. MAJOR FAIL. Getting these headlights open will take an act of congress and some divine intervention. I'm not baking or cutting these things either as replacements are too spendy for me at the moment. I'll drop back and punt.... looks like I'm ordering those direct-to-battery harnesses I referenced earlier. Now I'll also need to do the DRL killer (but might end up doing a fog-as-drl instead). With 300k miles on this thing, I'm not looking at pouring tons of time and money into getting my headlights to be spectacular. I'll settle for 85% of factor at this point.
Blckshdw
Moderator
If you weren't gonna bake or cut them open, how were you trying to get to the pins to release them from the socket inside the housing?
There is another aspect to investigate along with these other Headlight Wiring Issues:
It is paramount to ONLY use the ...RARE... ACDelco OEM Headlight Relay as a replacement part to assist the PCM in controlling the DRL via Pulse Width Modulation (PWM).
2004 Chevrolet Trailblazer Headlight Cut-Off Relay AC Delco 99129MY 2003
It is paramount to ONLY use the ...RARE... ACDelco OEM Headlight Relay as a replacement part to assist the PCM in controlling the DRL via Pulse Width Modulation (PWM).
2004 Chevrolet Trailblazer Headlight Cut-Off Relay AC Delco 99129MY 2003
For 2004 Chevrolet Trailblazer Headlight Cut-Off Relay AC Delco 99129MY 2003 | eBay
Find many great new & used options and get the best deals for For 2004 Chevrolet Trailblazer Headlight Cut-Off Relay AC Delco 99129MY 2003 at the best online prices at eBay! Free shipping for many products!
www.ebay.com
I guess I had myself convinced that the Oldsmobile lights were somehow "different"... I was wrong.